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7b6bb8da | 1 | # Copyright (C) 2003, 2005, 2007, 2008, 2009, 2010, 2011 |
4c38e0a4 | 2 | # Free Software Foundation, Inc. |
53df362e RG |
3 | # |
4 | # This program is free software; you can redistribute it and/or modify | |
5 | # it under the terms of the GNU General Public License as published by | |
e22f8b7c | 6 | # the Free Software Foundation; either version 3 of the License, or |
53df362e RG |
7 | # (at your option) any later version. |
8 | # | |
9 | # This program is distributed in the hope that it will be useful, | |
10 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | # GNU General Public License for more details. | |
13 | # | |
14 | # You should have received a copy of the GNU General Public License | |
e22f8b7c | 15 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
53df362e RG |
16 | # |
17 | ||
53df362e RG |
18 | # Tests for shared object file relocation. If two shared objects have |
19 | # the same load address (actually, overlapping load spaces), one of | |
20 | # them gets relocated at load-time. Check that gdb gets the right | |
21 | # values for the debugging and minimal symbols. | |
22 | ||
93f02886 | 23 | if {[skip_shlib_tests]} { |
d9407aaa NC |
24 | return 0 |
25 | } | |
26 | ||
53df362e RG |
27 | if $tracelevel then { |
28 | strace $tracelevel | |
29 | } | |
30 | ||
31 | # | |
32 | # This file uses shreloc.c, shreloc1.c and shreloc2.c | |
33 | # | |
34 | ||
53df362e RG |
35 | |
36 | set workdir ${objdir}/${subdir} | |
96b0c7ac DJ |
37 | set testfile "shreloc" |
38 | set libfile1 "shreloc1" | |
39 | set libfile2 "shreloc2" | |
40 | set srcfile $srcdir/$subdir/$testfile.c | |
41 | set lib1src $srcdir/$subdir/$libfile1.c | |
42 | set lib2src $srcdir/$subdir/$libfile2.c | |
43 | set binfile $objdir/$subdir/$testfile | |
44 | set lib1_sl $objdir/$subdir/$libfile1.sl | |
45 | set lib2_sl $objdir/$subdir/$libfile2.sl | |
46 | ||
47 | if [get_compiler_info ${binfile}] { | |
48 | return -1 | |
53df362e RG |
49 | } |
50 | ||
96b0c7ac DJ |
51 | set lib_opts "debug" |
52 | set exec_opts [list debug shlib=$lib1_sl shlib=$lib2_sl] | |
53df362e RG |
53 | |
54 | if {([istarget "*pc-cygwin"] || [istarget "*pc-mingw32"]) } { | |
05cfdb42 | 55 | lappend lib_opts "ldflags=-Wl,--image-base,0x04000000" |
53df362e RG |
56 | } |
57 | ||
96b0c7ac DJ |
58 | if [test_compiler_info "xlc-*"] { |
59 | ||
60 | # IBM's xlc compiler does not add static variables to the ELF symbol | |
61 | # table by default. We need this option to make the variables show | |
62 | # up in "maint print msymbols". | |
63 | ||
64 | lappend lib_opts "additional_flags=-qstatsym" | |
65 | ||
53df362e RG |
66 | } |
67 | ||
96b0c7ac DJ |
68 | if { [gdb_compile_shlib $lib1src $lib1_sl $lib_opts] != ""} { |
69 | untested "Could not build $lib1_sl." | |
70 | return -1 | |
71 | } elseif { [gdb_compile_shlib $lib2src $lib2_sl $lib_opts] != ""} { | |
72 | untested "Could not build $lib1_s2." | |
73 | return -1 | |
74 | } elseif { [gdb_compile $srcfile $binfile executable $exec_opts] != ""} { | |
75 | untested "Could not build $binfile." | |
53df362e RG |
76 | return -1 |
77 | } | |
78 | ||
96b0c7ac DJ |
79 | # Start with a fresh gdb. |
80 | ||
53df362e RG |
81 | gdb_exit |
82 | gdb_start | |
83 | gdb_reinitialize_dir $srcdir/$subdir | |
84 | gdb_load ${workdir}/shreloc | |
93f02886 | 85 | gdb_load_shlibs $lib1_sl $lib2_sl |
53df362e RG |
86 | |
87 | # Load up the shared objects | |
88 | if ![runto_main] then { | |
89 | fail "Can't run to main" | |
90 | return 0 | |
91 | } | |
92 | ||
93 | proc get_var_address { var } { | |
02746bbc MS |
94 | global gdb_prompt hex |
95 | ||
96 | # Match output like: | |
97 | # $1 = (int *) 0x0 | |
98 | # $5 = (int (*)()) 0 | |
99 | # $6 = (int (*)()) 0x24 <function_bar> | |
100 | ||
101 | gdb_test_multiple "print &${var}" "get address of ${var}" { | |
102 | -re "\\\$\[0-9\]+ = \\(.*\\) (0|$hex)( <${var}>)?\[\r\n\]+${gdb_prompt} $" | |
53df362e | 103 | { |
02746bbc MS |
104 | pass "get address of ${var}" |
105 | if { $expect_out(1,string) == "0" } { | |
106 | return "0x0" | |
107 | } else { | |
108 | return $expect_out(1,string) | |
109 | } | |
53df362e | 110 | } |
02746bbc MS |
111 | } |
112 | return "" | |
53df362e RG |
113 | } |
114 | ||
115 | # | |
116 | # Check debugging symbol relocations | |
117 | # | |
118 | ||
119 | # Check extern function for relocation | |
120 | set fn_1_addr [get_var_address fn_1] | |
121 | set fn_2_addr [get_var_address fn_2] | |
122 | ||
123 | if { "${fn_1_addr}" == "${fn_2_addr}" } { | |
124 | fail "relocated extern functions have different addresses" | |
125 | } else { | |
126 | pass "relocated extern functions have different addresses" | |
127 | } | |
128 | ||
129 | # Check extern var for relocation | |
130 | set extern_var_1_addr [get_var_address extern_var_1] | |
131 | set extern_var_2_addr [get_var_address extern_var_2] | |
132 | ||
133 | if { "${extern_var_1_addr}" == "${extern_var_2_addr}" } { | |
134 | fail "relocated extern variables have different addresses" | |
135 | } else { | |
136 | pass "relocated extern variables have different addresses" | |
137 | } | |
138 | ||
139 | # Check static var for relocation | |
140 | set static_var_1_addr [get_var_address static_var_1] | |
141 | set static_var_2_addr [get_var_address static_var_2] | |
142 | ||
143 | if { "${static_var_1_addr}" == "${static_var_2_addr}" } { | |
144 | fail "relocated static variables have different addresses" | |
145 | } else { | |
146 | pass "relocated static variables have different addresses" | |
147 | } | |
148 | ||
149 | # | |
150 | # Check minimal symbol relocations | |
151 | # | |
152 | ||
153 | proc send_gdb_discard { command } { | |
154 | # Send a command to gdb and discard output up to the next prompt | |
155 | ||
156 | global gdb_prompt | |
157 | ||
53df362e | 158 | # Discard output |
02746bbc | 159 | gdb_test_multiple "${command}" "${command}" { |
53df362e RG |
160 | -re ".*\[\r\n]+${gdb_prompt} $" { |
161 | return 1 | |
162 | } | |
163 | timeout { | |
164 | fail "{$command} (timeout)" | |
165 | return 0 | |
166 | } | |
167 | } | |
168 | } | |
169 | ||
170 | proc get_msym_addrs { var msymfile } { | |
171 | # Extract the list of values for symbols matching var in the | |
172 | # minimal symbol output file | |
173 | ||
174 | global gdb_prompt hex | |
175 | set result "" | |
176 | ||
177 | send_gdb "shell grep -E \" ${var}(\[ \t\]+.*)?\$\" ${msymfile}\n" | |
178 | ||
179 | while 1 { | |
180 | gdb_expect { | |
181 | -re "\[\[\]\[ 0-9\]+\] . (${hex}) ${var}(\[ \t\]+\[^\r\n\]*)?\[\r\n\]+" { | |
182 | set result [concat $result $expect_out(1,string)] | |
183 | } | |
184 | ||
185 | -re "$gdb_prompt $" { | |
a8b7528f | 186 | pass "get_msym_addrs ${var}" |
53df362e RG |
187 | return "${result}" |
188 | } | |
189 | ||
190 | -re "\[^\r\n\]*\[\r\n\]+" { | |
191 | # Skip | |
192 | } | |
193 | ||
194 | timeout { | |
195 | fail "get_msym_addrs ${var} (timeout)" | |
196 | return -1 | |
197 | } | |
198 | } | |
199 | } | |
200 | } | |
201 | ||
202 | proc check_same {var msymfile} { | |
203 | # Check that the minimal symbol values matching var are the same | |
204 | ||
205 | set len [llength [lsort -unique [get_msym_addrs "${var}" "${msymfile}"]]] | |
206 | ||
207 | if { $len == 1 } { | |
208 | return 1 | |
209 | } else { | |
210 | return 0 | |
211 | } | |
212 | } | |
213 | ||
214 | proc check_different {var msymfile} { | |
215 | # Check that the minimal symbol values matching var are different | |
216 | ||
217 | set addr_list [lsort [get_msym_addrs "${var}" "${msymfile}"]] | |
218 | set prev "" | |
219 | ||
220 | if { [llength ${addr_list}] < 2 } { | |
221 | return 0 | |
222 | } | |
223 | ||
224 | foreach addr ${addr_list} { | |
225 | if { ${prev} == ${addr} } { | |
226 | return 0 | |
227 | } | |
228 | set prev ${addr} | |
229 | } | |
230 | ||
231 | return 1 | |
232 | } | |
233 | ||
234 | set msymfile "${workdir}/shreloc.txt" | |
235 | ||
236 | if [send_gdb_discard "maint print msymbols ${msymfile}"] { | |
237 | if {[check_different "static_var_\[12\]" "${msymfile}"]} { | |
238 | pass "(msymbol) relocated static vars have different addresses" | |
239 | } else { | |
240 | fail "(msymbol) relocated static vars have different addresses" | |
241 | } | |
242 | ||
243 | if {[check_different "extern_var_\[12\]" "${msymfile}"]} { | |
244 | pass "(msymbol) relocated extern vars have different addresses" | |
245 | } else { | |
246 | fail "(msymbol) relocated extern vars have different addresses" | |
247 | } | |
248 | ||
249 | if {[check_different "fn_\[12\]" "${msymfile}"]} { | |
250 | pass "(msymbol) relocated functions have different addresses" | |
251 | } else { | |
252 | fail "(msymbol) relocated functions have different addresses" | |
253 | } | |
254 | } | |
255 | ||
256 | if {([istarget "*pc-cygwin"] || [istarget "*pc-mingw32"]) } { | |
257 | # | |
258 | # We know the names of some absolute symbols included in the | |
259 | # portable-executable (DLL) format. Check that they didn't get | |
260 | # relocated. | |
261 | # | |
262 | # A better approach would be include absolute symbols via the assembler. | |
263 | # | |
264 | if {[check_same "_minor_os_version__" "${msymfile}"]} { | |
265 | pass "Absolute symbols not relocated" | |
266 | } else { | |
267 | fail "Absolute symbols not relocated" | |
268 | } | |
269 | } |